I think it's a great idea: my first game, which I've never published, was based on the same idea .. but you had to pick the color which was less used.. If it's becoming highly popular I'm going to feel bad never publishing it !

Hi all!
Thanks to everyone for responses! I fixed some critical bugs that added by mistake as "freeze window" etc. and added vibro and music on /off during game.
Can anybody suggest me what colors are preferred?